The widespread tendency to approach philosophical problems from a linguistic and logical point of view, the focussing of attention on the use of words and signs and on the rules governing linguistic systems — these features will be immediately apparent to anyone who takes an interest in contemporary philosophy. Influential philosophical works have such titles as Logische Untersuchungen, Tractatus Logico-Philosophicus, Der logische Aufbau der Welt, Das literarische Kunstwerk, Ethics and Language, Logic and Language, From a Logical Point of View, to mention only a few characteristic works among many.¹